Oxygen Sensor: Service and Repair

Primary HO(2)S Replacement

Special Tools Required
O(2) sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available

Primary HO(2)S Replacement:

1. Disconnect the primary HO(2)S 4P connector (A), then remove the primary HO(2)S (B).
2. Install the primary HO(2)S in the reverse order of removal.

Secondary HO(2)S Replacement

Special Tools Required
O(2) sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available

Secondary HO(2)S Replacement:

1. Disconnect the secondary HO(2)S 4P connector (A), then remove the secondary HO(2)S (B).
2. Install the secondary HO(2)S in the reverse order of removal.